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    <title>大美江西 - 诗画赣鄱</title>
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        /* 全局基础设置 */
        * { margin: 0; padding: 0; box-sizing: border-box; }
        :root {
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            --font-calligraphy: 'Ma Shan Zheng', cursive; --font-sans: 'Noto Sans SC', sans-serif;
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        @keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
        .page-container {
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        /* 导航栏 */
        .navbar {
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        .navbar__logo-text { font-family: var(--font-calligraphy); font-size: 20px; color: var(--primary-green); }
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        .navbar__link:hover { color: var(--primary-green); }

        /* 首页头部 */
        .hero { position: relative; height: 70vh; overflow: hidden; }
        .hero__bg { position: absolute; inset: 0; z-index: 0; }
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            text-align: center; padding: 0 4vw;
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            font-family: var(--font-calligraphy); font-size: clamp(40px, 6vw, 80px);
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        /* 首页轮播 - 已放大尺寸 */
        .hero-carousel {
            width: 100%; max-width: 1120px; margin: 32px auto;
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        .hero-carousel__btn--prev { left: -20px; }
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            width: 12px; height: 12px; border-radius: 50%;
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        .hero-carousel__indicator.active { background-color: var(--white); }

        /* 江西概况 */
        .overview { position: relative; padding: 64px 4vw; overflow: hidden; }
        .overview__bg { position: absolute; inset: 0; z-index: 0; }
        .overview__bg-img { width: 100%; height: 100%; object-fit: cover; }
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            position: relative; z-index: 10; max-width: 896px; margin: 0 auto;
            color: var(--white);
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        .overview__title {
            font-family: var(--font-calligraphy); font-size: clamp(28.8px, 4vw, 48px);
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        .overview__text {
            font-size: 16px; line-height: 1.6; margin-bottom: 16px;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
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        /* 景点精选 */
        .featured-attractions { position: relative; padding: 64px 4vw; overflow: hidden; }
        .featured-attractions__bg { position: absolute; inset: 0; z-index: 0; }
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            font-family: var(--font-calligraphy); font-size: clamp(28.8px, 4vw, 48px);
            text-align: center; margin-bottom: 32px; color: var(--white);
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            gap: 32px;
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        .feature-card {
            position: relative; overflow: hidden; border-radius: 16px;
            box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1); cursor: pointer; height: 256px;
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        .feature-card__title {
            font-size: 24px; font-weight: 700; color: var(--white);
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5); margin-bottom: 8px;
        }
        .feature-card__text { font-size: 14px; color: var(--white); opacity: 0.7; }

        /* 景点分类页面 */
        .categories-page { padding: 64px 4vw; }
        .categories-page__title {
            font-family: var(--font-calligraphy); font-size: clamp(28.8px, 4vw, 48px);
            text-align: center; color: var(--primary-green); margin-bottom: 48px;
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        .category { margin-bottom: 64px; }
        .category__title {
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            padding-left: 12px; border-left: 3px solid var(--primary-green);
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        .category__title--brown { color: var(--primary-brown); border-left-color: var(--primary-brown); }
        .category__title--red { color: var(--primary-red); border-left-color: var(--primary-red); }
        .category__title--blue { color: var(--secondary-blue); border-left-color: var(--secondary-blue); }
        .category__grid {
            display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 32px;
        }
        .attraction-card {
            width: 100%; border-radius: 16px; overflow: hidden;
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1); background-color: var(--white);
            transition: transform 0.3s ease, box-shadow 0.3s ease; cursor: pointer;
        }
        .attraction-card:hover { transform: scale(1.03); box-shadow: 0 10px 25px -5px rgba(0,0,0,0.1); }
        .attraction-card__image-container { position: relative; height: 256px; overflow: hidden; }
        .attraction-card__image { width: 100%; height: 100%; object-fit: cover; transition: transform 0.7s ease; }
        .attraction-card:hover .attraction-card__image { transform: scale(1.1); }
        .attraction-card__tag {
            position: absolute; top: 16px; right: 16px; padding: 4px 12px;
            border-radius: 999px; background-color: rgba(45, 106, 79, 0.9);
            color: var(--white); font-size: 12px; font-weight: 500;
        }
        .attraction-card__tag--brown { background-color: rgba(92, 64, 51, 0.9); }
        .attraction-card__tag--red { background-color: rgba(188, 60, 41, 0.9); }
        .attraction-card__tag--blue { background-color: rgba(42, 157, 143, 0.9); }
        .attraction-card__title {
            position: absolute; top: 16px; left: 16px; right: 16px;
            font-size: 20px; font-weight: 700; color: var(--white);
            text-align: center; text-shadow: 0 2px 4px rgba(0,0,0,0.5);
        }
        .attraction-card__content { padding: 20px; }
        .attraction-card__desc {
            font-size: 14px; color: var(--gray-dark); line-height: 1.6;
            margin-bottom: 16px;
        }
        .attraction-card__footer {
            display: flex; justify-content: space-between; align-items: center;
            font-size: 14px;
        }
        .attraction-card__location {
            color: var(--gray-dark); opacity: 0.8; display: flex;
            align-items: center; gap: 4px;
        }
        .attraction-card__more {
            color: var(--primary-green); font-weight: 500; display: flex;
            align-items: center; gap: 4px; transition: color 0.3s ease;
            background: none; border: none; cursor: pointer;
        }
        .attraction-card__more--brown { color: var(--primary-brown); }
        .attraction-card__more--red { color: var(--primary-red); }
        .attraction-card__more--blue { color: var(--secondary-blue); }

        /* 旅游贴士页面 - 修改为3列两行布局 */
        .tips-page { padding: 64px 4vw; background-color: var(--gray-light); }
        .tips-page__title {
            font-family: var(--font-calligraphy); font-size: clamp(28.8px, 4vw, 48px);
            text-align: center; color: var(--primary-green); margin-bottom: 48px;
        }
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr); /* 固定3列 */
            gap: 32px; /* 增加间距 */
            max-width: 1200px; /* 限制最大宽度 */
            margin: 0 auto; /* 居中显示 */
        }
        .travel-tip-card {
            background-color: var(--white); padding: 24px; border-radius: 12px;
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
            height: 100%; /* 让卡片高度一致 */
            display: flex;
            flex-direction: column;
        }
        .travel-tip-card__title {
            font-size: 20px; font-weight: 700; color: var(--primary-brown);
            margin-bottom: 16px; border-left: 3px solid var(--primary-green);
            padding-left: 12px;
        }
        .travel-tip-card__title--red { border-left-color: var(--primary-red); }
        .travel-tip-card__title--blue { border-left-color: var(--secondary-blue); }
        .travel-tip-card__title--yellow { border-left-color: var(--secondary-yellow); }
        .travel-tip-card__list {
            list-style-type: disc; padding-left: 24px; color: var(--gray-dark);
            line-height: 1.8; font-size: 15.2px;
            flex-grow: 1; /* 让列表占满剩余空间 */
        }
        .travel-tip-card__list-item { margin-bottom: 8px; }

        /* 联系我们 */
        .contact-page { padding: 64px 4vw; background-color: var(--white); }
        .contact-page__title {
            font-family: var(--font-calligraphy); font-size: clamp(28.8px, 4vw, 48px);
            text-align: center; color: var(--primary-green); margin-bottom: 48px;
        }
        .contact-container {
            display: grid; grid-template-columns: 1fr 1fr; gap: 32px;
            max-width: 1280px; margin: 0 auto;
        }
        .contact-info {
            background-color: var(--gray-light); padding: 32px; border-radius: 12px;
        }
        .contact-info__title {
            font-size: 24px; font-weight: 700; margin-bottom: 24px;
            color: var(--primary-green);
        }
        .contact-info__item {
            display: flex; align-items: flex-start; gap: 16px;
            margin-bottom: 24px;
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        .contact-info__icon {
            width: 32px; height: 32px; border-radius: 50%;
            background-color: var(--primary-green); color: var(--white);
            display: flex; align-items: center; justify-content: center;
            flex-shrink: 0;
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        .contact-info__content {
            flex-grow: 1;
        }
        .contact-info__label {
            font-weight: 500; margin-bottom: 4px;
        }
        .contact-info__text {
            color: var(--gray-dark);
        }
        .contact-info__social {
            display: flex; gap: 16px; margin-top: 32px;
        }
        .contact-info__social-link {
            width: 40px; height: 40px; border-radius: 50%;
            background-color: var(--primary-green); color: var(--white);
            display: flex; align-items: center; justify-content: center;
            text-decoration: none; transition: background-color 0.3s ease;
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        .contact-info__social-link:hover {
            background-color: #24573f;
        }
        .contact-form-container {
            background-color: var(--gray-light); padding: 32px; border-radius: 12px;
        }
        .contact-form__title {
            font-size: 24px; font-weight: 700; margin-bottom: 24px;
        }
        .contact-form { width: 100%; }
        .contact-form__group { margin-bottom: 16px; }
        .contact-form__label { display: block; color: var(--gray-dark); margin-bottom: 8px; }
        .contact-form__input, .contact-form__textarea {
            width: 100%; padding: 12px 16px; border: 1px solid #9ca3af;
            border-radius: 8px; font-family: var(--font-sans);
        }
        .contact-form__input:focus, .contact-form__textarea:focus {
            outline: none; box-shadow: 0 0 0 2px var(--primary-green);
            border-color: var(--primary-green);
        }
        .contact-form__textarea { min-height: 100px; resize: vertical; }
        .contact-form__submit {
            background-color: var(--primary-green); color: var(--white);
            padding: 12px 24px; border-radius: 8px; border: none;
            width: 100%; font-weight: 500; transition: background-color 0.3s ease;
            cursor: pointer;
        }
        .contact-form__submit:hover { background-color: #24573f; }

        /* 返回顶部按钮 */
        .back-to-top {
            position: fixed; right: 24px; bottom: 24px;
            background-color: var(--primary-green); color: var(--white);
            width: 48px; height: 48px; border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
            opacity: 0; visibility: hidden; transition: all 0.3s ease;
            z-index: 50; border: none; cursor: pointer;
        }
        .back-to-top.visible { opacity: 1; visibility: visible; }
        .back-to-top:hover { background-color: #24573f; }

        /* 页脚 */
        .footer { background-color: var(--primary-brown); color: var(--white); padding: 32px 4vw; }
        .footer__content { max-width: 1280px; margin: 0 auto; }
        .footer__links { display: flex; justify-content: center; gap: 32px; margin-bottom: 24px; }
        .footer__link { color: var(--white); opacity: 0.8; text-decoration: none; transition: opacity 0.3s ease; }
        .footer__link:hover { opacity: 1; }
        .footer__copyright { text-align: center; color: #9ca3af; font-size: 14px; }

        /* 响应式 */
        @media (min-width: 768px) {
            .navbar__logo-text { font-size: 24px; }
        }
        @media (min-width: 1024px) {
            .featured-attractions__grid { grid-template-columns: repeat(3, 1fr); }
            .category__grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 1024px) {
            /* 中等屏幕下改为2列 */
            .tips-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .contact-container { grid-template-columns: 1fr; }
            .hero-carousel__image { height: 256px; }
            /* 小屏幕下改为1列 */
            .tips-grid {
                grid-template-columns: 1fr;
            }
        }
    </style>
</head>
<body>
    <!-- 顶部导航栏 -->
    <nav class="navbar">
        <a href="#" class="navbar__logo page-link" data-page="home">
            <span class="navbar__logo-text">江西旅游</span>
        </a>
        <div class="navbar__links">
            <a href="#" class="navbar__link page-link" data-page="home">首页</a>
            <a href="#" class="navbar__link page-link" data-page="categories">景点推荐</a>
            <a href="#" class="navbar__link page-link" data-page="travel-tips">旅游贴士</a>
            <a href="#" class="navbar__link page-link" data-page="contact">联系我们</a>
        </div>
    </nav>

    <!-- 页面容器 -->
    <div class="page-container">
        <!-- 首页内容 -->
        <div id="home" class="page-content active">
            <header class="hero">
                <div class="hero__bg">
                    <img src="https://picsum.photos/id/29/1920/1080" alt="江西山水风光" class="hero__bg-img">
                    <div class="hero__bg-overlay"></div>
                </div>
                <div class="hero__content">
                    <h1 class="hero__title">大美江西，诗画赣鄱</h1>
                    <p class="hero__subtitle">探索江西必去景点，感受自然与人文的交融之美</p>
                    
                    <!-- 首页轮播 -->
                    <div class="hero-carousel">
                        <div class="hero-carousel__item active">
                            <img src="https://picsum.photos/id/28/1200/400" alt="庐山" class="hero-carousel__image">
                            <div class="hero-carousel__desc">
                                <h3 class="hero-carousel__title">庐山 - 匡庐奇秀甲天下</h3>
                                <p class="hero-carousel__text">世界文化遗产，中国著名避暑胜地，以雄、奇、险、秀闻名</p>
                            </div>
                        </div>
                        <div class="hero-carousel__item">
                            <img src="https://picsum.photos/id/110/1200/400" alt="武功山" class="hero-carousel__image">
                            <div class="hero-carousel__desc">
                                <h3 class="hero-carousel__title">武功山 - 云中草原</h3>
                                <p class="hero-carousel__text">万亩草甸，星空露营胜地，徒步爱好者的天堂</p>
                            </div>
                        </div>
                        <div class="hero-carousel__item">
                            <img src="https://picsum.photos/id/142/1200/400" alt="婺源" class="hero-carousel__image">
                            <div class="hero-carousel__desc">
                                <h3 class="hero-carousel__title">婺源 - 中国最美乡村</h3>
                                <p class="hero-carousel__text">春季油菜花海，秋季晒秋人家，徽派建筑聚集地</p>
                            </div>
                        </div>
                        <div class="hero-carousel__item">
                            <img src="https://picsum.photos/id/164/1200/400" alt="滕王阁" class="hero-carousel__image">
                            <div class="hero-carousel__desc">
                                <h3 class="hero-carousel__title">滕王阁 - 江南三大名楼之首</h3>
                                <p class="hero-carousel__text">因王勃《滕王阁序》闻名，登楼可俯瞰赣江美景</p>
                            </div>
                        </div>
                        <div class="hero-carousel__item">
                            <img src="https://picsum.photos/id/133/1200/400" alt="井冈山" class="hero-carousel__image">
                            <div class="hero-carousel__desc">
                                <h3 class="hero-carousel__title">井冈山 - 革命摇篮</h3>
                                <p class="hero-carousel__text">中国革命的摇篮，红色旅游胜地</p>
                            </div>
                        </div>
                        <button class="hero-carousel__btn hero-carousel__btn--prev" id="prev-btn">
                            <i class="fa fa-chevron-left"></i>
                        </button>
                        <button class="hero-carousel__btn hero-carousel__btn--next" id="next-btn">
                            <i class="fa fa-chevron-right"></i>
                        </button>
                    </div>
                    <div class="hero-carousel__indicators">
                        <button class="hero-carousel__indicator active" data-index="0"></button>
                        <button class="hero-carousel__indicator" data-index="1"></button>
                        <button class="hero-carousel__indicator" data-index="2"></button>
                        <button class="hero-carousel__indicator" data-index="3"></button>
                        <button class="hero-carousel__indicator" data-index="4"></button>
                    </div>
                </div>
            </header>
            
            <!-- 江西概况 -->
            <section class="overview">
                <div class="overview__bg">
                    <img src="https://picsum.photos/id/142/1920/1080" alt="江西风光" class="overview__bg-img">
                    <div class="overview__bg-overlay"></div>
                </div>
                <div class="overview__content">
                    <h2 class="overview__title">江西概况</h2>
                    <p class="overview__text">江西，简称"赣"，位于中国东南部，长江中下游南岸。这里山清水秀，人文荟萃，既有雄奇险峻的自然风光，又有底蕴深厚的历史文化。</p>
                    <p class="overview__text">江西是中国革命的摇篮（井冈山、瑞金），也是陶瓷文化发源地（景德镇），旅游资源丰富多样，拥有庐山、三清山、龙虎山等世界遗产，婺源、井冈山等知名旅游目的地，每年吸引数百万游客前来探索。</p>
                    <p class="overview__text">江西四季分明，气候宜人，每个季节都有独特的旅游体验：春季赏花、夏季避暑、秋季观景、冬季温泉，是全年皆宜的旅游胜地。</p>
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                        <!-- 庐山 -->
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                                <p class="feature-card__text">匡庐奇秀甲天下，世界文化遗产</p>
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                                <h3 class="feature-card__title">婺源</h3>
                                <p class="feature-card__text">中国最美乡村，春季油菜花海</p>
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                        <!-- 武功山 -->
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                                <h3 class="feature-card__title">武功山</h3>
                                <p class="feature-card__text">云中草原，星空露营胜地</p>
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                                <h3 class="feature-card__title">井冈山</h3>
                                <p class="feature-card__text">革命摇篮，红色旅游胜地</p>
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                        <!-- 滕王阁 -->
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                                <h3 class="feature-card__title">滕王阁</h3>
                                <p class="feature-card__text">江南三大名楼之首</p>
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                        <!-- 瑞金 -->
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                                <h3 class="feature-card__title">瑞金</h3>
                                <p class="feature-card__text">共和国摇篮，红色旅游经典景区</p>
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                        <!-- 1. 庐山 -->
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                                <span class="attraction-card__tag">世界文化遗产</span>
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                                <p class="attraction-card__desc">匡庐奇秀甲天下，以雄、奇、险、秀闻名，拥有三叠泉、含鄱口、五老峰等著名景点，是中国四大避暑胜地之一。</p>
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                                <span class="attraction-card__tag">云中草原</span>
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                            <div class="attraction-card__content">
                                <p class="attraction-card__desc">拥有万亩高山草甸，是露营和观赏星空的绝佳地点，四季风光各异，尤以秋季云海最为壮观，是徒步爱好者的天堂。</p>
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                                <h4 class="attraction-card__title">婺源</h4>
                                <span class="attraction-card__tag attraction-card__tag--brown">中国最美乡村</span>
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                            <div class="attraction-card__content">
                                <p class="attraction-card__desc">以徽派建筑和田园风光闻名，春季江岭油菜花海、秋季篁岭晒秋是标志性景观，还有李坑、晓起等保存完好的古村落。</p>
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                                    <span class="attraction-card__location"><i class="fa fa-map-marker"></i>上饶市</span>
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                        <!-- 2. 滕王阁 -->
                        <div class="attraction-card" data-category="tengwangge">
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                                <img src="https://picsum.photos/id/164/600/400" alt="滕王阁" class="attraction-card__image">
                                <h4 class="attraction-card__title">滕王阁</h4>
                                <span class="attraction-card__tag">江南三大名楼</span>
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                            <div class="attraction-card__content">
                                <p class="attraction-card__desc">因王勃《滕王阁序》而闻名天下，登楼可俯瞰赣江美景，感受"落霞与孤鹜齐飞，秋水共长天一色"的诗意。</p>
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                                    <span class="attraction-card__location"><i class="fa fa-map-marker"></i>南昌市</span>
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                <!-- 第三类：红色旅游类 -->
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                        <!-- 1. 井冈山 -->
                        <div class="attraction-card" data-category="jinggangshan">
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                                <span class="attraction-card__tag attraction-card__tag--red">革命摇篮</span>
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                                <p class="attraction-card__desc">中国革命的摇篮，拥有众多革命遗址和纪念场馆，是爱国主义教育基地，同时自然风光秀丽，适合红色旅游和生态旅游。</p>
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                                    <span class="attraction-card__location"><i class="fa fa-map-marker"></i>吉安市</span>
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                                <h4 class="attraction-card__title">瑞金红色景区</h4>
                                <span class="attraction-card__tag attraction-card__tag--red">共和国摇篮</span>
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                                <p class="attraction-card__desc">中华苏维埃共和国临时中央政府诞生地，保留了大量革命历史遗迹，包括叶坪革命旧址群、红井等著名景点。</p>
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                                    <span class="attraction-card__location"><i class="fa fa-map-marker"></i>赣州市</span>
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                        <h3 class="travel-tip-card__title">最佳旅游时间</h3>
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                            <li class="travel-tip-card__list-item">春季（3-5月）：婺源油菜花、庐山杜鹃花、井冈山杜鹃花海</li>
                            <li class="travel-tip-card__list-item">夏季（6-8月）：庐山、武功山等山区避暑</li>
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                            <li class="travel-tip-card__list-item">航空：南昌昌北国际机场、赣州黄金机场等</li>
                            <li class="travel-tip-card__list-item">高铁：沪昆高铁、京九高铁贯穿全省，主要城市均有高铁站</li>
                            <li class="travel-tip-card__list-item">景区交通：部分景区内部需乘坐观光车，如庐山</li>
                            <li class="travel-tip-card__list-item">自驾：江西高速公路网络发达，适合自驾游，尤其婺源乡村路段</li>
                            <li class="travel-tip-card__list-item">长途汽车：连接各市县及主要景区，班次频繁</li>
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                        <h3 class="travel-tip-card__title--blue">特色美食推荐</h3>
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                            <li class="travel-tip-card__list-item">南昌：瓦罐汤、炒粉、藜蒿炒腊肉、白糖糕</li>
                            <li class="travel-tip-card__list-item">九江：庐山云雾茶、湖口蒸米糕、萝卜饼</li>
                            <li class="travel-tip-card__list-item">婺源：粉蒸肉、糊豆腐、蒸汽糕、糯米子糕</li>
                            <li class="travel-tip-card__list-item">赣南：客家酿豆腐、三杯鸡、艾米果</li>
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                        <h3 class="travel-tip-card__title--yellow">实用注意事项</h3>
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                            <li class="travel-tip-card__list-item">山区温差大，即使夏季也需携带薄外套，尤其早晚温差明显</li>
                            <li class="travel-tip-card__list-item">春季婺源、秋季庐山等热门景点游客较多，建议提前预订住宿</li>
                            <li class="travel-tip-card__list-item">徒步武功山等景区，建议穿舒适防滑的运动鞋</li>
                            <li class="travel-tip-card__list-item">尊重当地风俗习惯，进入宗教场所请遵守相关规定</li>
                            <li class="travel-tip-card__list-item">部分景区海拔较高，注意防晒，备好防晒用品</li>
                            <li class="travel-tip-card__list-item">提前了解景区开放时间和门票预约政策，尤其是节假日</li>
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                        <h3 class="travel-tip-card__title">经典旅游线路</h3>
                        <ul class="travel-tip-card__list">
                            <li class="travel-tip-card__list-item">山水精华游：南昌（滕王阁）- 九江（庐山）- 婺源</li>
                            <li class="travel-tip-card__list-item">红色文化游：南昌（八一起义纪念馆）- 吉安（井冈山）- 赣州（瑞金）</li>
                            <li class="travel-tip-card__list-item">自然奇观游：庐山 - 武功山</li>
                            <li class="travel-tip-card__list-item">文化体验游：婺源（徽文化）- 赣州（客家文化）</li>
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                            <li class="travel-tip-card__list-item">南昌：建议住在滕王阁附近或八一广场周边，交通便利</li>
                            <li class="travel-tip-card__list-item">庐山：可选择山上酒店体验山间生活，或山下牯岭镇住宿</li>
                            <li class="travel-tip-card__list-item">婺源：篁岭景区内有特色民宿，江岭附近有农家乐</li>
                            <li class="travel-tip-card__list-item">武功山：金顶有客栈，也可选择帐篷露营体验星空</li>
                            <li class="travel-tip-card__list-item">旅游旺季（如婺源春季）建议提前1-2周预订住宿</li>
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            function switchPage(pageId) {
                pageContents.forEach(page => page.classList.remove('active'));
                const targetPage = document.getElementById(pageId);
                if (targetPage) {
                    targetPage.classList.add('active');
                    window.scrollTo({ top: 0, behavior: 'smooth' });
                }
            }
            pageLinks.forEach(link => {
                link.addEventListener('click', function(e) {
                    e.preventDefault();
                    switchPage(this.getAttribute('data-page'));
                });
            });

            // 2. 首页轮播
            const carouselItems = document.querySelectorAll('.hero-carousel__item');
            const indicators = document.querySelectorAll('.hero-carousel__indicator');
            const prevBtn = document.getElementById('prev-btn');
            const nextBtn = document.getElementById('next-btn');
            let currentIndex = 0;
            let carouselInterval;
            function startCarousel() {
                carouselInterval = setInterval(() => {
                    currentIndex = (currentIndex + 1) % carouselItems.length;
                    updateCarousel();
                }, 5000);
            }
            function updateCarousel() {
                carouselItems.forEach((item, index) => item.classList.toggle('active', index === currentIndex));
                indicators.forEach((indicator, index) => indicator.classList.toggle('active', index === currentIndex));
            }
            prevBtn.addEventListener('click', () => {
                clearInterval(carouselInterval);
                currentIndex = (currentIndex - 1 + carouselItems.length) % carouselItems.length;
                updateCarousel();
                startCarousel();
            });
            nextBtn.addEventListener('click', () => {
                clearInterval(carouselInterval);
                currentIndex = (currentIndex + 1) % carouselItems.length;
                updateCarousel();
                startCarousel();
            });
            indicators.forEach(indicator => {
                indicator.addEventListener('click', () => {
                    clearInterval(carouselInterval);
                    currentIndex = parseInt(indicator.dataset.index);
                    updateCarousel();
                    startCarousel();
                });
            });
            startCarousel();

            // 3. 返回顶部按钮
            const backToTopBtn = document.getElementById('back-to-top');
            window.addEventListener('scroll', () => {
                backToTopBtn.classList.toggle('visible', window.scrollY > 300);
            });
            backToTopBtn.addEventListener('click', () => {
                window.scrollTo({ top: 0, behavior: 'smooth' });
            });

            // 4. 表单提交处理
            const contactForm = document.querySelector('.contact-form');
            contactForm.addEventListener('submit', function(e) {
                e.preventDefault();
                // 简单的表单验证
                const name = document.getElementById('name').value;
                const email = document.getElementById('email').value;
                const message = document.getElementById('message').value;
                
                if (!name || !email || !message) {
                    alert('请填写完整的表单信息');
                    return;
                }
                
                // 模拟表单提交成功
                alert('您的留言已发送，我们将尽快回复您！');
                contactForm.reset();
            });
        });
    </script>
</body>
</html>